lineage: Complete the rebrand

* TODO: Rebrand cmsdk when it's in a working state

Change-Id: I0d8d573f9e0032110ae3a0f54ebe11a877b83137

prebuilt/common/bin/backuptool.sh

@@ -5,7 +5,7 @@
 
 export C=/tmp/backupdir
 export S=/system
-export V=14.1
+export V=15.0
 
 # Scripts in /system/addon.d expect to find backuptool.functions in /tmp
 cp -f /tmp/install/bin/backuptool.functions /tmp
@@ -34,7 +34,7 @@ check_prereq() {
 if [ ! -r /system/build.prop ]; then
     return 0
 fi
-if ( ! grep -q "^ro.cm.version=$V.*" /system/build.prop ); then
+if ( ! grep -q "^ro.lineage.version=$V.*" /system/build.prop ); then
   echo "Not backing up files from incompatible version: $V"
   return 0
 fi